well i'm assuming the idea in this case is to get some sunscreen on the hair to stop the dye fading without also adding weight or grease etc
i haven't tried any leave in product that i like but need some sun protection for this current piece. tempted to try straight sunblock spray honestly.
i'm of two minds about this. in theory, the best time to have conditioner in your hair is when you're out in the sun, because you're basically deep conditioning. but deep conditioning ime tends to make dye bleed a little so i'm wondering if straight sunblock will be more effective for color retention.
i don't like any of the leave in products i've tried for conditioning and prefer to be minimalistic with products. i don't even shampoo, just apply a reconstructor and a homemade color conditioner every few weeks.